Clifton Royston schrieb: (...)
>> Greylisting we know today has many advantages: >> - it makes lot of spam not delivered >> - as a result, it offloads mail/filter servers from content filtering >> >> It has a big disadvantage: it introduces delay in mail delivery. >> >> As I checked my mail server's stats, with greylisting applied to each >> and every incoming message, > > That's not by any means a necessary implementation. Applying > graylisting only to *servers* (IP addresses) rather than the > server+sender+receiver tuple that some recommend, means that any > server from which you receive legitimate mail will rapidly enter the > non-delayed IP set and thereafter will experience no delays. > > An alternative application of your core idea would be to count a > server IP address as successfully un-graylisted (i.e. enter it into the > DB) only when it delivers a mail which passes amavisd as non-spam. > This could be done "behind" amavisd in an after-queue deployment. Still, in all of these cases, there would be at least one unnecessary delay (sometimes meaning that instead of finishing some project in one day, it will last two days, because some new guy from around the globe couldn't deliver you message on time). -- Tomasz Chmielewski http://wpkg.org ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ AMaViS-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/amavis-user AMaViS-FAQ:http://www.amavis.org/amavis-faq.php3 AMaViS-HowTos:http://www.amavis.org/howto/
